The source of the bluestones at Stonehenge has long been a subject of fascination and considerable controversy. One type of bluestone, the so-called ‘spotted dolerite’, was convincingly traced to the Mynydd Preseli area in north Pembrokeshire in the early 1920s.

On Sunday 27 February between 12 and 4pm, the National Waterfront Museum will come alive to mark St David’s Day with a mix of performance, music, dragons and giant bouncing sheep on stilts for the whole family to enjoy.